| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 12°F | 32°F | 22°F | 0.5" |
| February | 16°F | 34°F | 25°F | 0.4" |
| March | 22°F | 45°F | 33°F | 1.0" |
| April | 27°F | 55°F | 40°F | 1.1" |
| May | 35°F | 65°F | 50°F | 1.5" |
| June | 44°F | 77°F | 60°F | 1.2" |
| July | 52°F | 87°F | 70°F | 1.0" |
| August | 49°F | 83°F | 66°F | 0.7" |
| September | 41°F | 72°F | 56°F | 1.2" |
| October | 31°F | 56°F | 42°F | 1.1" |
| November | 24°F | 46°F | 35°F | 0.3" |
| December | 11°F | 29°F | 20°F | 0.7" |
| Index | Hanna | Wyoming | National |
| Air quality index | 47 | 39 | 42 |
| Pollution index | 1,128,450 | 1,779,975 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 247 |
| Days with moderate air quality | 118 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.004% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.010% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Elk Mountain, WY | 167 | 47 | 6.0% |
| Hanna, WY | 830 | 47 | 6.0% |
| City | Population | Air Quality Index | National Avg. |
| Lakeville, CT | 830 | 37 | 26.0% |
| Shalimar, FL | 830 | 31 | 38.0% |
| Rhine, GA | 830 | 26 | 48.0% |
| Stafford, KS | 830 | 40 | 20.0% |
| Cardwell, MO | 830 | 26 | 48.0% |
| Hanna, WY | 830 | 47 | 6.0% |
Here are the best places to live in Wyoming
See the best places to live in Hanna
Check out the 10 most dangerous cities in Wyoming
Most Dangerous States In The US